Drive-differential for motor-cars.



W. R. PILLMDRE.

DRIVE DIFFERENTIAL FOR MOTOR CARS.

APPLICATION FILED MAY 24, 1917.

1,246, 1 55 A v Patented Nov. 13, 1917.

2 SHEETSSHEET 1- v a f. /.6" /z 1 911 M coo W. R. PILLMORE.

DRIVE DIFFERENTIAL FOR MOTOR CARS.

APPLECATION FILED MAY 24. Ian.

1 ,246, l 5 5 Patented Nov. 13, 1917.

2 SHEETS-SHEET 2.

auuenloz Be it known that-'L'VVILIJAM-RoY PIL From, a citizen of the -United 'States',"-residing at l/Vesternville', in" the county of Oneida and State of New York; have -in% winner/t osePILL oRn.or wnsrnnnvxttnaivnwiyonxe P.

smegma-mam Fora inoiroa cans. 4

Aptlie'ation filed May 243917. Serial 110170 710;

To all cchom'it concern)", i-

vented Ia new and useful 'Drive Differential for Motor-Cars, of which the followingis a specification lhe device "forming subject Inatter of thisf'a'pplication is a'jdiflferential drive for motor propelled vehicles, 3 and one object of tl1e:.1I1VQI1t-1OI1 s to PiOVIClQ novel means stance, thevehiclegtnrns a"cor'n'er.

lt'is within the province of the disclosure to improve generally, and to; 'enhance the utility of (devices, of; that type to which the present invention appertains; 1

\Vi'th the above and other objects in View which Willappearas the description pro e I c'eedsQthe invention resides in "the; combinationandj arrangement of parts and in' the details of construction hereinafter described c invention herein disclosedcanhe made with in'the scone of what'is claimed, withoutfdei Fig. 2. Inthe drawingsthere i sh wn a rotataand claimed, fit 7 being-i understood that changes'in the 'precise le'mbodiment of the parting from the spirit of the, invention.

In the accompanying drawings Figure 1 shows m top plan, aidllferential mechanism embodying. one part of the inv'enaon; parts being broken awav; I

Fi 2"1s a hor zontalsection showlng a.

modified formof'th i Fig. 3is a section on the-l ne f v Fig. 4 1s a section onfthe of Me hollow shaft 1 which inay be driven in any suitable manner. as by means of a beveled gear wheel 2 fixed to the shaft 1, a

beveled pinion 3 meshinr: into the gear wheel :2. and a driving shaft 4 whereon the pinion 3 is mounted. v

A beveled gear Wheel 5 is fixed to one end of the hollow shaft 1 and meshesinto abeveled pinion 6 carried for rotationona stub shaft 6 fixed in one ground wheel 8.

'The -ground wheel 8 carries a fixed stub shaft 7 on which is jourrialed a pinion? i disposed'op posite to the pinion 6 'and'meshQ in'g into thegea'r wheel 5;

Joiirnaled for rotation in theho1lowshaft" lahd-ordinarily adapted to rotate-at the samespecification of Letters Rama's. l it! I,

speed as theshaft'l is an inner shaft 9 to'one i end of which isfi-Xed'a'beveledgearld The beveled pinlons 6andTmeshintothe beveled g m Wheel 10.-F iXed to the other end of the" shaft '9 is beveled gear wheel 11 ineshing'into;

beveled pinions '12 and 14." The 'p'iniOns'I'Z and 1 1, are jon'rnaled respectively, on stub v. shafts 12f and 14' fixed in'a'wheel The beveled pinion '12 meshes-into fa" beveled pinion 16 and the beveled pini niemeshes' into abeveled pinion 17. Thepinion lGis onrnaledon a fixed stub shaft" '16?" carried" by the wheel 15 and the beveled pinion 17 is 'joni'naledjon a fixedstnb shaft 17* ear 1 ried'hy the wheel 15. The pinions l'? and 16 mesh' into a gear wheel ls fi d t fith hollow shaft 1 at one endthereof} I) In order to'avoid confusion in the inseof" the terms clockwise and counter-clock wise, let itbe assumed that' the -'observer 7 views thegear wheels- 11, 18, 5 and'lO in'thedirection of the arrow A in" Fig; 1, and that he v ews the gearwheels 6; 71,17. 14,12 and 16in the direction of the arrow B in Fig.1.

. Thenfi'ffa clockwise rotation is imparted to the shaft 1; a clockwise rotation willibe imparted'to the gear wheels 5 ant-118, The 1 gear wheel/5. n'ioving"elockwiseiktendstore 3 the pinion? counter-clockwise. 'Thepinions land 7 tendtofrotate the gearwheel; 10'

tate' the pinion 6 clocliwise',f and to rotate counterclockwise lent,- as hereinafter ex -Y" pla1ned, the gear'wheel 10 and the shaft 9' cannot rotate counter-clcckwise during this operation. 'Iherefone,- the wheel 8 receive's' a positive clockwise rotati'on'froin'the'fixe'd shafts 6? and 7 of the pinionsiG and? re spectively;

VVhen' the gear wheel-'18 is rotated 1 clockwise as aforesaid. the pinion 16 tends to ro- T tate counter-clockwise; and the 'pinion 12 "tends to rotate clockwise.

tends to rotate clockwise and the'pin'ion 14:

The pinion 1' 17 tends to rotate 1 counter-clockwise The pinions 14 and 12 tend to rotate the gear wheel 11 and the shaft 9 clockwisebut the V to rotate the gear wheel 10 and the shaft 9 counter-clockwise. as hereinbefore set gearv wheel 11 and the shaft 9 will not rotate fclockw1se, because the pinions 6 and 7 tend forth. Therefore, when-the gear wheel 18 is rotated clockwise, a clockwise rotation will be imparted to the wheel 15 from the fixed shafts 15, 16, 17 and 11 of the pinions 15, 16, 17, and 14, respectively.

From the foregoing it will be observed that the structure forming the subject matter of this application provides a means whereby a positive forward rotation at a common speed may be imparted to the wheels 8 and 15.

In rounding a corner, let it be supposed that the wheel 15 runs, in a clockwise direction, faster than the wheel 8 and faster than the gear wheel 18. Then, the gear wheel 18 will rotate the pinion 16 clockwise, the pinion 16 will rotate the pinion 12 counterclockwise, and the pinion 12 will rotate the gear wheel 11 counterclockwise, the pinions 1 1 and 17 contributing toward this result. The shaft 9 and the gear wheel 10 will rotate counter-clockwise and the pinion 6 will rotate clockwise and ride on the gear wheel 5, the pinion 7 rotating counter-clockwise and riding on the gear wheel 5.

In carrying out the invention as shown in.

Figs. 2, 3 and 1, there is provided a disk 20 corresponding to the hollow shaft 1. Journaled in the disk 20 is a shaft 19, represented in Fig. 1 by the shaft 9. The disk 20 is driven by any suitable means such as a beveled gear 21. replacing the parts 2, 3 and 4 of Fig. 1. The disk 20 has a flange 22 carrying an internal gear 23 corresponding to the part 5 of Fig. 1. The disk 20 has a flange 24 provided with an internal gear represented in Fig. 1 by the gear wheel 18. Bearings 26 and 27 are shown, an axle 28 being journaled in the bearing 26, and an axle 29 being iournaled in the bearing 27. The numeral 31 denotes a disk secured to the shaft 28. A disk 30 is secured to the shaft 29. The disk 30 carries stub shafts 32 and 33. Pinions 3% are journaled on the stub shafts, the pinions 3 meshing into the internal gear 25. The pinions 34: take the place of the parts 16 of Fig. 1. The pinions mesh into pinions 35 on the shafts 33, the pinions 35 being represented in Fig. 1 by the parts 12. The pinions 35 mesh into a gear 36 attached to the shaft 19, the gear 36 having the functions of the part 11 of Fig. 1. The disk 31 carries stub shafts 37. Journaled on the stub shafts are pinions 38 mesh- Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

ing into the gear 23, the pinions 38 being represented in Fig. 1 by the parts 6 and 7. The pinions 38 mesh into a gear wheel fixed to the shaft 19 and corresponding to the part 10 of Fig. 1.

The operation of the structure shown in Figs. 2, 3 and a, does not differ materially from the operation of the device delineated in Fig. 1.

In practical operation, when the disk 20 is rotated in the direction of the arrow F, the internal gear 23 of course rotates in the same direction. The gear 23 tends to rotate the pinions 38 in the direction of the arrow H. The pinions 38 tend to rotate the gear wheel 39 in the direction of the arrow G, but, as hereinafter explained, the gear wheel 39 cannot rotate in the direction of the arrow G during the operation above mentioned. Therefore, a positive rotation is imparted to the disk 31 and the axle 28.

When the disk 20 rotates in the direction of the arrow F, the pinion 3-1 tends to rotate in the direction of the arrow K, the pinion 35 tends to rotate in the direction of the arrow L, and the gear wheel 36 tends to rotate in the direction of arrow M, but the gear wheel 36 and the shaft 19 can not rotate in the direction of the arrow M, because the gear wheel 39 tends to rotate in the direction of the arrow G, as hereinbefore eX- plained. A positive rotation is, therefore, imparted to the disk 30 and the axle 29.

laving thus described the invention, what is claimed is:

A differential embodying an outer driven member and gears rotatable therewith; a shaft journaled in the outer driven member; wheels fixed to the shaft; a pinion meshing into one gear and into one gear wheel; pinions meshing into each other and meshing respectively into the other gear and into the other gear wheel; and means for connecting the first specified pinion and the last specified pinions with the respective wheels to be driven.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

\VILLIAM ROY PILLMORE.

Witnesses:

NM. F. PILLMORE, WILLIAM H. JONES.

Vla11ington, D. C. 

